STEM (2024)

The STEM system is the brainchild of the genius scientist Ruben Victoriano, and an instrument for MOBIUS to achieve their goal of total world dominion.


  • 1 History
  • 2 Design
    • 2.1 Terminus
    • 2.2 Core
    • 2.3 Connection
  • 3 Function
  • 4 Corruption
  • 5 STEM Machine Rooms
  • 6 Locations in STEM
  • 7 Trivia


Ruvik created STEM with the intention of using it to create a reality of his own design so that he couldbe with his sister Laura Victoriano.

Dr. Marcelo Jimenez, being a long time friend of Ruvik, decided to help Ruvik out and provide him with materials and patients. Around this time, MOBIUS had made Jimenez a member and had him share his work with them. After Jimenez published Ruvik's work, MOBIUSbecame interested in it and wanted to be involved. Mobius ended up putting Ruvik in a tight situation;either he finished the project, or they would remove him from the equation. The relationship between MOBIUSand Ruvik only became worse and worse over time.

At first, STEM was such that it necessitated that subjects be plugged into the system via cord, andanyone could be hooked up to the machine. The next iteration was instead wireless, and an even later version allowedRuvik to modify it so that only hewho could operate it. Brain synchronization was the only way to access STEM. In an attempt to get around this, MOBIUS made efforts to find someone who had similar brain waves as Ruvik;this was where Leslie came in, for his ability to brain sync was identical to Ruvik. This sync was derived from experiencingspecific trauma:Ruvik had lost his sister and murdered his parents, whileLeslie had lost his whole family.

After this,The Administrator demanded that Ruvik fix the changes he had put in place so that capturing/using the unstable Leslie would not be necessary. When Ruvikrefused, they had no other choice but to take what they needed from him and do it themselves. They killed Ruvikand took his brain, which they then placed within the center of the STEM system to act as a core, attempting to then resume testing. However, Ruvik's lingering consciousness was slowly taking over STEM. He had turned the majority of the STEM system itself into a hellish landscape of various levels, with each subject who was attached to it having some subconscious dream-like influence, but only Ruvik was in total control of his influence. He then began to kill anyone who was sent into STEM.

Once MOBIUS realized thisthey had his brain removed from the core. Though they thought they had gotten rid of him,they soon learned that Ruvik's consciousness was still present within STEM - its state as a hellscape persisted. Jimenez and The Administrator together devised a plan:they wouldsend a group of people into STEM -the more "sane" individuals amongst those sent in would be used to cleanse the system and to neutralize Ruvik. They planned to send Juli Kidman in, who was already undercover as a Junior Detective, to complete this task. They also planned to send her with her two colleagues Sebastian Castellanos and Joseph Oda. They saw Sebastian as a threat due to him getting closer to the truth and finding out about them, and sent Joseph to ensure that they left no loose ends.

Jimenez wanted to prove himself useful by defying his orders and attempting to complete the task himself - desperately he cravedto make Mobius see his worth, lettinghim potentially rise higher in their ranks. He activated the wireless STEMswitch himself when the police, including the detectives arrived at Beacon Mental Hospital. This is wherethe game began. Turning on the wireless machine caused everyone in the area to be dragged into STEM. However, theeffect was slow in fully taking effect.Seizing theopportunity, Ruvik used the small period where reality and the mindscape blurred: he manifested in the hospital and killedthe entire police squadbefore wounding Jimenez. Within STEM already (though obviously failing to realise this), the detectives found the doctor and desperately attempted toescape from the hospital in anambulance. It was too late, however, as STEM had overcome the delay and had fully taken effect, dragging everyone into the mindscape beyond. They were all trapped inside of STEM.

(In the DLC, it shows the sinister application of the system in controlling human's subconsciousness through a high-pitched frequency emitting from the system.)



The STEM system as it appeared in the series is composed of several bathtub-like ports called Terminus. A would-be STEM occupant will then be seated in one such port, whereupon an electrically-induced coma will knock them out and create a mental projection in their image within the connected world.

While the earlier iterations of STEM utilize physical jacks plugged into a person's cranium to inject them into its worlds, more advanced versions of the device rely on wireless signals instead, which eliminates the need for a physical Terminus and can potentially work on a global scale.


All Terminus ports are then connected to a central Core processor. This Core in itself is a biologically-living component, being comprised of a whole person or their brain, whose mental patterns are then used as a map to project a virtual world in which other plugged-in subjects can inhabit.

While MOBIUS' initial Beacon prototype has an exposed Core (essentially Ruvik's brain in a jar), their later revision to the system has a dedicated Core chamber complete with locks and a security terminal.


Connecting to STEM can be achieved wirelessly via specific frequencies emitted from a source, which deposits the subject into the simulated world immediately without them knowing it. Another, less speedy method is to sit in a STEM pod and be connected via an electrically-induced coma, which gives the pod occupant the sensation of them being pulled down into a large water body, where they will appear to fall before suddenly halting due to synchronization. In its earliest days, an individual must be connected physically into STEM space with a dedicated jack (see above).

Both methods have their pros and cons, as while Ruvik's version of STEM can create instant connections over a wide area without the need for pods, the configuration is limited to simulating an individual's immediate surroundings before slowly bending it to the creator's will. The newer device tested by MOBIUS, while slower and a lot less comfortable jacking into, can deposit the pod occupant into any pre-programmed backdrop without hassle, thus allowing for controlled insertion and extraction if needed.


STEM is a system that allows multiple minds to be brought together and connected. Using a bathtub-like pod called a Terminus, subjects can be connected to one particular mind and experience the memories, and perceptions of the individual. There are two ways to connect the person to the system: through physical connection via plug and through wireless frequency (advanced version).

However, the applications of STEM are numerous. This includes curing people of their mental illnesses, interrogation of criminals and learning people's memories.

In order for the STEM system to work, it requires a main consciousness to act as a core. This would load his/her world as base, for the others to come. According to the Administrator, the core requires a mind to be innocent and pure to support multiple different kinds of personality. As the result, the core must be the mind of a child. However, based on the research of Yukiko Hoffman, the core must have an unfettered ego to interlink the different personalities of people connected to STEM as well as retaining their own personality. In her own words, there are two types of candidates that can serve as a core: a psychopath with egomaniac mind and a child. Due to the event that involves Ruvik in Beacon Hospital, MOBIUS has opted to choose a child rather than a psychopathic individual.

During the events of The Evil Within 2, it is stated in a report that if there are enough people being connected to STEM to serve as processing and memory components to generate 2 million exabytes (1 EB = 1,0246MB), the STEM system would be powerful enough to wirelessly connect to every human on the planet, enabling MOBIUS to control the world.

For MOBIUS members, all of them have a chip implant that connects them to STEM in the real world, even if they are not within the system mentally.

According to Dr. Hoffman, the mind of a psychopath is extremely dangerous to the STEM environment since they can have powerful manipulation over STEM, such as the case with Stefano Valentini.


Any given individual connected into STEM space are liable to become dominated by the system's psychological disruptions. This is a gradual process, the rate of which depends mostly on the psychological fortitude of a subject, meaning those who are weaker-willed (e.g. Joseph Oda) are more susceptible to domination than the mentally-hardened ones (e.g. Sebastian Castellanos). This resistance can also be conditioned via specialised training, which is included as part of the standard orientation procedure for MOBIUS personnel. Regardless, there is currently no true defense against psychological erosion from STEM usage, and individuals connected to it will eventually turn at some point, some earlier than others.

As they become more and more subsumed by the domination effects, a subject becomes more and more unstable, the earliest symptoms of which being memory losses or headaches. Their mentality then degrades exponentially over time, which the subject may or may not be aware of. At later stages, an individual may exhibit and repeat unusual behavior (e.g. Valerio Jimenez).

At the height of their domination, the subject either becomes a Haunted or a Lost, depending on the specific STEM space they are connected to, and a fully-dominated subject is irreversibly lost. Certain subjects with special psychological makeup can instead be transfigured into unique creatures like the sad*st or The Keeper, either spontaneously or at the discretion of the Core. These subjects, while not entirely feral, are ruthless, murderous and cannot be reasoned with.

Should a damaged mind be safely disconnected from STEM, the system would leave specific imprints within their psychological makeup that can cause permanent nerve scarring.

STEM Machine Rooms[]

The main area used to plug people directly and physically into STEM.It is usually a circular room consisting of bathtub-like pods where subjects are placed, and a central area containing the core.

The Beacon Prototype's STEM machine room made multiple appearances inside of STEM visited by both Sebastian Castellanos in the The Evil Within, and Juli Kidman in The Consequence. Multiple prototypes of the machine were also found in different places and they all differ in complexity.

Locations in STEM[]

Most of the areas in The Evil Within are locations in the real world as well as STEM. The real life ones are different and usually infested by Haunted, but all are based on the memories of people connected to STEM, usually the main characters. However, some are only seen in STEM and are usually created by someone inside as a completely altered version of a real world room.

In The Evil Within 2, the entire city of Union is constructed within STEM by MOBIUS and does not exist outside it. It is infested by Lost.


  • The name "STEM" is derived from "brainstem", referring to the machine's ability to link consciousnesses.
  • The STEM system seemingly has an undocumented function where the psychological profiles of an individual can presumably be logged and simulated at will independent of their actual connection to the system. In all likelihood, this is the most plausible explanation for Oscar Connelly's appearance in The Executioner despite his death prior to the events of the DLC and the survival of Joseph Oda, despite the demise of his STEM self.
  • It's unclear how many people STEM was able to pull in via the wireless signal at the start of the game, and it's unclear what happens to their bodies in the real world as well.
  • It is stated that it will require 2 millions exabyte to control the planet wirelessly and a single person in the STEM can generate 100 exabyte. Therefore, MOBIUS needs at least 20000 people to be connected to STEM to achieve their goal.
  • Even though Sebastian, Connely and Joseph were pulled into STEM via the wireless signal, they were placed by MOBIUS in the bathtub-like terminuses when they arrived at the scene and were plugged directly into the system, as shown in glimpses from Sebastian's point of view, as well as at the end of the game. Kidman, on the other hand, was pulled in via the wireless signal, but was not plugged into the system and instead, she seemingly woke up standing.
  • During The Consequence, where you play as Juli, after you see the cutscene where Leslie is running away from you, you can walk to the center of the STEM machine room where Ruvik´s brain is and shoot it. A fake ending will play and then things glitch back to Juli standing right where she was before. You will get an achievement for this.
  • In recorded experiments with Terminus ports in The Evil Within 2, it is stated that there are possible, undocumented sublevels of STEM that are inaccessible and inescapable by normal means; comparable to a form of limbo. Subjects in these tests are theorized to have been lost or died.
  • The master password to MOBIUS' STEM system is "stemadmin123", which can be observed in a split-second during the finale of The Evil Within 2.
  • According to The Art of The Evil Within, the STEM system was developed through the centuries as a means to rid patients of their insanity while also concealing a more devious purpose. It's name was given by those who have seen it, likening it to the stem of the brain.
    • Earlier variants of the STEM design had its occupants strung together while submerged in a large pool within Beacon Mental Hospital.


The Evil Within Locations
Krimson City

Krimson CityBeacon Mental HospitalKrimson ExpresswayKrimson SubwayPrestige HotelMannequin FactoryKrimson City Police Department Precinct

Surrounding Areas

Randall's CrossingElk River VillagePerth HouseVictoriano EstateCedar Hill Church


STEMMOBIUS Headquarterssad*st's Torture RoomSafe Haven

Legend: Real World and STEM, STEM only


The Evil Within 2 Locations

Residential AreaUnion City HallBusiness DistrictUnion Nature Preserve


Safe HouseThe MarrowMOBIUS HeadquartersSTEM


Castellanos HouseSebastian's RoomStefano Valentini's DomainTheodore Wallace's DomainLimbo

Legend: Real World and STEM, STEM only, Real World only
STEM (2024)


What is the hardest STEM subject? ›

1. Engineering (especially Chemical, Electrical, and Aerospace): Engineering programs often involve complex math, physics, and design concepts that require strong problem-solving skills. Expect heavy workloads, with extensive problem sets, lab work, and projects.

What makes STEM so hard? ›

Are STEM Majors Hard? STEM majors are considered some of the most challenging and demanding majors, as they require a strong foundation in math and science as well as a masterful display of critical thinking and problem-solving skills. Some of the most challenging STEM majors are: Computer Science.

Am I smart enough for STEM? ›

How to Know if STEM Is the Right Fit. Students less comfortable in science and math may have more difficulty working through course requirements in STEM programs. Experts say STEM students should be able to think critically about situations and develop solutions to solve problems.

Why is STEM worth it? ›

Here are just some of the benefits of STEM career: Increased Salary – People employed in STEM occupations earn over double the median income according to the U.S. Bureau of Labor and Statistics (USBLS). Job Security – Science & technology jobs have also seen a 79% growth in the past 3 decades.

What is the #1 hardest major? ›

List of the Hardest College Majors
  1. Legal Studies. Average GPA: 3.35. ...
  2. Computer Science. Average GPA: 3.0. ...
  3. Environmental Earth Science. Average GPA: 2.96. ...
  4. Chemistry. Average GPA: 2.77. ...
  5. Environmental Economics and Policy. Average GPA: 2.95. ...
  6. American Studies. Average GPA: 3.12. ...
  7. Nuclear Engineering. Average GPA: 3.14. ...
  8. Energy Engineering.

What is the easiest STEM? ›

The 6 Easiest STEM Degrees
  1. Agricultural Economics. ...
  2. Agriculture Production and Management. ...
  3. Animal Sciences. ...
  4. Environmental Engineering. ...
  5. Health and Safety Engineering.

Are STEM students autistic? ›

Although stereotypes oversimplify, there is empirical evidence that persons on the autism spectrum, estimated at 1.4% of the population (Christensen et al., 2016), are more likely to study and work in STEM than their neurotypical peers (Ruzich et al., 2015; Wei, Yu, Shattuck, McCracken, & Blackorby, 2013).

Is STEM good for ADHD students? ›

Benefits of STEM Education for ADHD Students

The creative and intuitive nature of children with ADHD lend itself well to pedagogical models often used in STEM education. For example, the 'flipped classroom' often used in STEM education classes works well for children with ADHD.

What percentage of students go into STEM? ›

Of the 1.8 million bachelor's degrees awarded in 2015–16, about 331,000 (18 percent) were in STEM fields. The percentage of bachelor's degrees awarded that were in STEM fields varied by race/ethnicity.

Are STEM jobs oversaturated? ›

A comprehensive literature review, in conjunction with employment statistics, newspaper articles, and our own interviews with company recruiters, reveals a significant heterogeneity in the STEM labor market: the academic sector is generally oversupplied, while the government sector and private industry have shortages ...

Do STEM students make more money? ›

STEM workers earn more than non-STEM workers, regardless of sex, race, ethnicity, or disability status.

What are the disadvantages of STEM education? ›

However, the problem with the push towards STEM education is that the increased focus on analytical reasoning might leave students lacking in other areas of schooling primarily influenced by art and humanities. These areas include creative thinking, the development of humor, and even emotional regulation.

What is the number 1 hardest subject? ›

The Top Toughest Courses in the World
  • Chemical Engineering. ...
  • Pharmacy. ...
  • Astrophysics. ...
  • Medicine. ...
  • Electrical Engineering. ...
  • Chartered Accountancy. ...
  • Law. A law degree's difficulty is in the amount of reading required. ...
  • Nursing. Nursing is another course that is often regarded as one of the most challenging.
Oct 24, 2023

What is the best STEM subject? ›

The top 5 STEM Courses to Study Abroad are:
  • Engineering Management.
  • Computer Science.
  • Computer Engineering.
  • Information Technology.
  • Aerospace Engineering.
Apr 24, 2024

What is the hardest science field? ›

Chemistry is listed as one of the hardest science majors because it requires a diverse skill set and knowledge set. Students need to take courses in organic and inorganic chemistry, physics, calculus, and research methods. Many specialized courses involve complex terminology and chemical structures.

Is physics the hardest stem major? ›

Like biology and chemistry–its hard science cousins– physics-related subject matter is considered to be quite challenging, earning it a spot on many hardest college majors lists. Undergraduates typically take courses in calculus, thermodynamics, electricity and magnetism, and quantum mechanics.

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